Moveon originally planned on staging this is a "runoff" election, featuring only Dean, Kucinich and Kerry. Somewhere along the way they changed their minds, included all the candidates, and added the "Other" and "Undecided" categories.

Beats me why they did that. Probably for self-promotion purpose. This primary received a great deal of press, and they probably figured having the runoff sometime in Q3 would allow the origanization to reap additional coverage for the organization, which ultimately is a good thing. Perhaps not for Dean today, but he'll win any runoff next quarter, and Moveon will be richer and more able to support lots of wonderful progressive causes.